linux-kernel - Re: [PATCH v5 06/27] irq_domain/powerpc: eliminate irq_map; use irq_alloc

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Date:	Tue, 3 Apr 2012 10:23:56 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Andreas Schwab <schwab@...ux-m68k.org>,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Milton Miller <miltonm@....com>,
	Rob Herring <rob.herring@...xeda.com>,
	linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 06/27] irq_domain/powerpc: eliminate irq_map; use
 irq_alloc_desc() instead

On Mon, 2 Apr 2012, Russell King - ARM Linux wrote:
> If we want to fix it a better way, then sure, that'll be good.  But what
> we shouldn't do is re-introduce one regression to fix a different
> regression.
> 
> So, Thomas, what do you think about providing a way that a disabled
> interrupt could have its pending status cleared such that when it's
> enabled, any queued events are ignored?  Maybe an enable_and_clear_irq() ?
 
We can make it a flag, which you can either add to the irq itself or
hand it in on request_irq().

Does that require a special chip->callback() function as well ?

Thanks,

	tglx
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